Improvement in extension devices for chandeliers



J. ROBERTS. EXTENSION DE'VIACE Fon GHA'NDELIERS. No. 187,673. Y PatentedFeb. l20, 1877.

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Wbzesses N.PETERS, PHOTO-LIYHOGRAFHER, WS'HNGTUN. D.

UNITED STATES PATENT Ormea.

JACOB ROBERTS, OF BROOKLYN, NEW YORK.

IMPROVEMENT IN EXTENSION"DEVICES FOR CHANDELIIERS.

Specification forming part of Letters Patent No. 187,673, dated February20, 1877; application tiled January 17, 1877.

i To all whom it may concern:

-reference being had to the accompanying drawing, which forms part ofthis specification. l

This invention, which is more especially designed for chandelierscarrying oil or other lamps, consists in a combination of an outer tube,an inner tube or slide having inclined faces, and an incline-faced dogcontrolled by a counterbalance weight or spring, and havj ing anattached rod or handle, said dog operating to secure the inner tube orslide in any suitable position within the outer tube, against anymovement either in an upward or downward direction.

In the accompanying drawing, Figures l Y and 2 are vertical sections, inplanes at right angles witb'eaeh other, of the stem and body portion ofa chandelier having Vmy improved extension devices applied. Figs. 3 areviews, in perspective, ofthe inner tube, in part, having inclined facesand the incline-faced dog which locks therewith.

A is the center portion or body of the chandelier, from which the armsthat carry the lamps or lights project. B is the pendent or other headof the chandelier, carrying a spring-drum, C, which serves tocounterbalance, or approximately so, the extension portion of thechandelier; or one or more counterbalance-weights may be substituted forthe spring-drum. D is an outer tube, attached at its upper end to theunder side ofthe head B. E is an inner tube, secured at its lower end tothe center portion or body A, and fitting freely but snugly Within theouter tube I). Thisinner tube is reduced on one side at its upper end,to form inclined faces b b. Gr is a dog, also arranged to freely fitwithin the outer tube D, and constructed with inclined faces c c, whichtaper upward and in a reverse direction to the inclined faces b b,against which they are brought to bear when holding the sliding orextension portion of the chandelier in position. This incline-faced dogis attached at its upper end, by cord, chain, or strap d, with thespring-drum G, and has secured to its lower end a rod or handle, H,which passes loosely down within the inner tube E, and through thecenter piece or bodyA, beneath which it is secured in an adjustablemanner by a regulating screw-nut, I. K is an outer casing orcovering-tube, which may either rest loosely on or be rigidly attachedat its lower end to the top of the center portion or body A,

The operation is as follows: The body A, or rising-and-falling portionof the chandelier, is kept raised at any desired elevation which may begiven to it by the` binding or bearing of the tube E in rear of itsinclined faces b b, and the binding or bearing ol' the back of the dog Gagainst the inner surface of the outer tube D, as the weight of thesliding portion of the chandelier and counterbalancing action ofthespring-drum C bring the inclined faces b b and c c in close contact, orlock with each other. To lower the chandelier, it is only necessary todraw down by the nut I on the rod H, so as to release the dog Gr fromits binding or bearing action against the inclined faces b b of the tubeE, when the latter, with its attachments, will descend by their ownweight, or may be readily drawn down. Upon releasing hold of the nut I,the spring-drum C draws on the dog G, to lock the tube E again within oragainst the outer tube D. To raise the chandelier, rst liberate the dogGr, by pressing with the linger down on the nut I, and then, and whilecontinuing the downward pressure on the nut, pressing slightlyupward onthe center portion or body A, when the dog G will follow up the inclinedfaces b b of the tube E, and on ceasing to lift on the body A the lockis again established of the inner tube E with the outer tube D, by theaction of the inclined faces b b and c c of said inner tube and the dogGr The screw adjustment of thel nut I on the Arod H provides for takingup slack in the devices which serve to lift from above the dog G, aswear or other circumstances :may require.

The suspending-strap d may be, and is represented as, made of a dat bandof springsteel, which, in its normal condition, is coiled, and so exertsa constant tendency to draw up the 'deg G simlock the ehahnnf, saidStrap trolled by a counterhalance Weight or spring,

and the rod H', substantially as and for the purpose or purposes hereinset forth.

2. rIlie combination 'of theil'tl 'riig d lwith the mainspring-dum C;the ihciinefaced dog G, the inner slide or tube E, having one or moreinclined faces, b b, and the outer tube D, substantially as specified.

JACOB ROBERTS.

Witnesses:

FRED. HAYNES, EDWARD B. SPERRY.

